Question

I have two MySQL databases: one for testing, and one for production. They are on different servers. These tables should be identical, however one table has one more row than the other. How would I find this row?

Answer 1

You could try:

1. Export second server table in a SQL file (using MySqlDump)
2. Edit file changing table name
3. Import SQL file into first server

Then run

SELECT t1.* FROM table1 t1
LEFT JOIN table2 t2
  ON t1.id = t2.id
WHERE t2.id IS NULL